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DS1270Y/AB
8. If WE is low or the WE low transition occurs prior to or simultaneously with the CE low transition,
the output buffers remain in a high-impedance state during this period.
9. Each DS1270 has a built-in switch that disconnects the lithium source until the user first applies V CC .
The expected t DR is defined as accumulative time in the absence of V CC starting from the time power
is first applied by the user. This parameter is assured by component selection, process control, and
design. It is not measured directly during production testing.
10. All AC and DC electrical characteristics are valid over the full operating temperature range. For
commercial products, this range is 0 ° C to 70 ° C. For industrial products (IND), this range is -40 ° C to
+85 ° C.
11. In a power-down condition the voltage on any pin may not exceed the voltage on V CC .
12. t WR1 and t DH1 are measured from WE going high.
13. t WR2 and t DH2 are measured from CE going high.
14. DS1270 modules are recognized by Underwriters Laboratories (UL) under file E99151.
DC TEST CONDITIONS
Outputs Open
Cycle = 200ns for operating current
All voltages are referenced to ground
AC TEST CONDITIONS
Output Load: 100 pF + 1TTL Gate
Input Pulse Levels: 0.0 to 3.0 volts
Timing Measurement Reference Levels
Input: 1.5V
Output: 1.5V
Input pulse Rise and Fall Times: 5 ns
ORDERING INFORMATION
PART
DS1270AB-70#
DS1270AB-70IND#
DS1270Y-70#
DS1270Y-70IND#
TEMP RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
SUPPLY
TOLERANCE
5V ± 5%
5V ± 5%
5V ± 10%
5V ± 10%
PIN-PACKAGE
36 740 EDIP
36 740 EDIP
36 740 EDIP
36 740 EDIP
SPEED GRADE
(ns)
70
70
70
70
#Denotes a RoHS-compliant device that may include lead(Pb) that is exempt under the RoHS requirements.
PACKAGE INFORMATION
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages . Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix
character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
36 EDIP
PACKAGE CODE
MDT36#2
OUTLINE NO.
21-0245
LAND PATTERN NO.
—
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